Inventor · disambiguated record
Karl-Friedrich Etzold
Also filed as: ETZOLD KARL-FRIEDRICH
8 granted patents·2,088 citations·filing 1975–1999
90Inventor score
Top patents by PatentIndex Score
8 records- 0197US5051736AOptical stylus and passive digitizing tablet data input systemIBM·Filed 1989·Granted Sep 24, 1991·1.9k cites·15 claims
- 0284US4181864AMatching network for switchable segmented ultrasonic transducersRCA CORP·Filed 1978·Granted Jan 1, 1980·39 cites·2 claims
- 0381US6239936B1Method and apparatus for calibrating a thermal response of a magnetoresistive elementIBM·Filed 1997·Granted May 29, 2001·34 cites·32 claims
- 0473US6453266B1Peak detecting shock gauge and damage diagnostic for mobile and handheld computersIBM·Filed 1999·Granted Sep 17, 2002·65 cites·19 claims
- 0560US5806978ACalibration apparatus and methods for a thermal proximity sensorIBM·Filed 1996·Granted Sep 15, 1998·12 cites·36 claims
- 0652US3969578AVisual display of ultrasonic radiation patternRCA CORP·Filed 1975·Granted Jul 13, 1976·12 cites·15 claims
- 0737US6586058B1Equipment packages for shock resistanceIBM·Filed 1997·Granted Jul 1, 2003·11 cites·35 claims
- 0828US4349902APiezoelectric transducer for recording video informationRCA CORP·Filed 1980·Granted Sep 14, 1982·1 cites·9 claims
Join the waitlist — get patent alerts
Get an alert when Karl-Friedrich Etzold files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →